Fountain pen



FIG. 1 is an exploded front elevational view of a fountain pen showing my new design, the opposite side of the nib being conventional;

FIG. 2 is an inverted rear perspective view of the fountain pen in the closed condition; and

FIG. 3 is a rear perspective view of FIG. 1 in the closed condition. 

The ornamental design for a fountain pen, substantially as shown and described. 